AnastaziaOpfer8476 AnastaziaOpfer8476

03-12-2021
Health

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Do intercostal muscles contract or relax when we breathe.

Respuesta :

bullockha1 bullockha1

03-12-2021

Answer:

the internal intercostal muscles relax and the external intercostal muscles contract, pulling the ribcage upwards and outwards. the diaphragm contracts, pulling downwards. lung volume increases and the air pressure inside decreases.

Explanation:

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